Outer Limits 4x4 Board

Has anyone attempted to run OME RUF without a chassis extension? I am interest because from photos of vehicles with the extension the front shackles appear to very vertical. By leaving the spring mounts in the stock location and running a slight extended shackle, at rest the angle of the shackle would be probably be in the vicinity of 20 to 30 degrees from vertical. Is there anything wrong with this?

Its been done with a longer flatter shackles and the eye bush hole re-drilled further back in the mount (rear of front spring)

bigsteve wrote:Its been done with a longer flatter shackles and the eye bush hole re-drilled further back in the mount (rear of front spring)

do you know of anyone that has without re-drilling the rear mount of the spring? if i move the rear mount of the spring then i loose the advantage of being able to move the diff forward.

i think jake lawson has just bolted them in

We tried it with Grimbo's car without moving the rear mount backwards at all and it just inverted the shackle immediately, that was with a 2" longer shackle.

I have seen it done with the rear mount re drilled further back and it should work without an extension, but there will be very little wheelbase extension and so it won't be as helpful to fitting a big tyre, and the balance of the car will not be positively affected as much.

Big Steve's car never flattened it's springs out as much as other cars running this set up so the shackles always ended up sitting quite vertical. I can assure you it has plenty of travel though, and generally, the shackles only invert if you are doing something very stoopid.

On Bigsteves, the front mount position was set by mounting the spring unladen and stretching the shackle out to "full droop" then welding everything up, bolting the axle in and that's where it sat.

The more angle on the shackle the lower the car sits and the worse the approach angle, so we were hooting for lift. I was planning on doing mine EXACTLY 75mm over stock with OME RUF, but other plans have interupted and I am now going to a link suspension.

Gwagensteve wrote:We tried it with Grimbo's car without moving the rear mount backwards at all and it just inverted the shackle immediately, that was with a 2" longer shackle.

I have seen it done with the rear mount re drilled further back and it should work without an extension, but there will be very little wheelbase extension and so it won't be as helpful to fitting a big tyre, and the balance of the car will not be positively affected as much.

Big Steve's car never flattened it's springs out as much as other cars running this set up so the shackles always ended up sitting quite vertical. I can assure you it has plenty of travel though, and generally, the shackles only invert if you are doing something very stoopid.

On Bigsteves, the front mount position was set by mounting the spring unladen and stretching the shackle out to "full droop" then welding everything up, bolting the axle in and that's where it sat.

The more angle on the shackle the lower the car sits and the worse the approach angle, so we were hooting for lift. I was planning on doing mine EXACTLY 75mm over stock with OME RUF, but other plans have interupted and I am now going to a link suspension.

wouldn't there be more chance of inverting a shackle if it was vertical to begin with as apposed to it angled out towards the front?

i was thinking about a 75mm extension, but my engineer doesn't seem to like any modification to the chassis.

here is a comparison between the new OME rear and an old lift front spring

The shackle inverts forwards, like this ]_ rather then _]Under even mild compression. How about attaching the spring eye to the end of the chassis (we did this with Critta- ljxtreem) when we went to MQ springs. this is not really an "extension" just a bracket (could even be made bolt on). this might be just enough I think. wioth Critta we made a dart shaped bracket that welded about 60mm under the chassis and up the full height of the rail, with the shackle tube set into it. This would give you about 50mm of "extension" perhaps enough to get by, and can look quite trick

It seems that extensions are OK with engineers here in Vic, but I guess there are always lots of variables with what engineers will allow. You will have plenty of trouble trying to run RUF with stock shock mounts if the engineer reckons you can't "modify" the chassis!

Gwagensteve wrote:The shackle inverts forwards, like this ]_ rather then _]Under even mild compression. How about attaching the spring eye to the end of the chassis (we did this with Critta- ljxtreem) when we went to MQ springs. this is not really an "extension" just a bracket (could even be made bolt on). this might be just enough I think. wioth Critta we made a dart shaped bracket that welded about 60mm under the chassis and up the full height of the rail, with the shackle tube set into it. This would give you about 50mm of "extension" perhaps enough to get by, and can look quite trick

It seems that extensions are OK with engineers here in Vic, but I guess there are always lots of variables with what engineers will allow. You will have plenty of trouble trying to run RUF with stock shock mounts if the engineer reckons you can't "modify" the chassis!

I like the idea of the brackets aat the front of the chassis rail. i could probally be made bolt on if it bolted to the bullbar mounts. The shock mounts are a bit of a problem. I might just have to have a bit more in depth conversation with my engineer. i may end up running just a normal set of lifted front springs untill after i get my certificate. Then i'll have a bit more of a play around with the setup.

Check my thread on RUF.

I still have the photos if ya need them. I cut of the orig bracket and welded it back about 1.5".

cheers

how 'bout shackle reversal? or too much mucking around and engineering issues?

Yup, and not enough gain. (I did one about 7 years ago, early in my build and and just hacked it off)

i'm pretty sure tim/redzook runs shackle reversal with his RUF... seems to work damn well...


so ya reckon that the benefits of that (better approach angle cos no shackles to hit, wheel moving backwards on compression over obstacle etc) aren't worth it? why not?

stumped wrote:i'm pretty sure tim/redzook runs shackle reversal with his RUF... seems to work damn well...


so ya reckon that the benefits of that (better approach angle cos no shackles to hit, wheel moving backwards on compression over obstacle etc) aren't worth it? why not?

nope i dont.
will have a sr shortly though cos i hit the dam shackles on everything

redzook wrote:nope i dont.
will have a sr shortly though cos i hit the dam shackles on everything

go coils

redzook wrote:

stumped wrote:i'm pretty sure tim/redzook runs shackle reversal with his RUF... seems to work damn well...


so ya reckon that the benefits of that (better approach angle cos no shackles to hit, wheel moving backwards on compression over obstacle etc) aren't worth it? why not?

nope i dont.
will have a sr shortly though cos i hit the dam shackles on everything

Thats coz your tyres are too damn small

bigsteve wrote:

redzook wrote:

stumped wrote:i'm pretty sure tim/redzook runs shackle reversal with his RUF... seems to work damn well...


so ya reckon that the benefits of that (better approach angle cos no shackles to hit, wheel moving backwards on compression over obstacle etc) aren't worth it? why not?

nope i dont.
will have a sr shortly though cos i hit the dam shackles on everything

Thats coz your tyres are too damn small

ive got a feelin my approach is way better then yours

redzook wrote:

stumped wrote:i'm pretty sure tim/redzook runs shackle reversal with his RUF... seems to work damn well...


so ya reckon that the benefits of that (better approach angle cos no shackles to hit, wheel moving backwards on compression over obstacle etc) aren't worth it? why not?

nope i dont.
will have a sr shortly though cos i hit the dam shackles on everything

damn, woulda sworn i had a memory of a red zook with SR not jake's maybe? meh... coulda been dreamin

wit SPOA, tim's zook's got a decent approach angle for a leafy bigsteve

what is your approach angle?

Redzook = ?????

Bigsteve = ?????

its easy longer shackles dont need any other modification if it inverts put a stopper bolt through the shackle SIMPLE cheap lift if any thing it allows more freedome and movement FLEX in the diff

Barathrum wrote:what is your approach angle?

Redzook = ?????

Bigsteve = ?????

wheels straight

wheels hard left

Barathrum wrote:what is your approach angle?

Redzook = ?????

Bigsteve = ?????

Tims would be better, just look at how far he has moved his diff forward, I preferred the extra dropp of RUF so I left my axle in the stock rear holes.

bigsteve wrote:

Barathrum wrote:what is your approach angle?

Redzook = ?????

Bigsteve = ?????

Tims would be better, just look at how far he has moved his diff forward, I preferred the extra dropp of RUF so I left my axle in the stock rear holes.

oh come on bigsteve.
we all know the differences between the two different setups. but we'd still like to see what it is.

my front spring is in the stock rear hanger

if that makes sence

it uses the stock location in the rear with an extension upfront

I did rears up front with longer shackles, it flexed well and handled better than it did with "missing link" style shackles, bit to be honest I would not bother with it again.. A chassis extension is the best way of doing it.

If your engineer does not like the extended chassis .. he would spew if he saw shackles long enough to fit the rear up front ..

I'm gonna have to sit down and have a better talk with my engineer.
At the monent i'm just throwing ideas around, to gain a better understanding of my different options.
The different sugestions that have be made in this tread are proving to be very interesting.

Get a rears up front bolt on kit. You can move the diff forward or it has an adaptor plate to keep it near the stock location (moves it about 1/2 inch forward which is negligable).

use missing links from trailtough, or rocky road. you can use stock hangers like that...

Hey wolverine.

Have you put yours on yet?

have to catch up sooner or later.

cheers